Dynamo-electric machine.



E MATTMAN.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED on. 6. 1909.

'1 1 5 1 0 Patepted Apr. 27, 1915.

ED STALHZTES PATENT OFFICE.

EMIL MATTMAN, OF MILWAUKEE;WISCONSIN, ASSIGNOR, BY ASSIGNMENTS, TO ALLIS-CHALMERS MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

DYNAMO ELECTRIG MACHINE.

Specification of Letters Patent.

Patented Apr. 27, 1915.

Application filed October 6, 1909; Serial No. 521,375.

To all whom it may concern Be it known that I, Earn. MATTMAN, a citizen of Switzerland, residing at Milwaukee, ;in the county of Milwaukee and State of l/Visconsin, have invented certain new and useful Improvements in Dynamo- Electric Machines, of which the following is a full, clear, and exact specification.

My invention relates to dynamo-electric machines, and particularly 'to means for ventilating and cooling such machines.

One method ofventilating and cooling the windings and the internal structure of dynamo-electric machines is to force an over the parts to be cooled either by air I blast from an outside source or by means of a special blower or fan arrangement mountpart of the rotating element of the machine.

The object of myinvention is to provide a novel fan arrangement for the purpose of creating and circulating fluid currents to ventilate and keep cool the windings and structure of dynamo-electric machines.

In the accompanying sheet of drawings, Figure 1 is a partial longitudinal sectional viewrof an induction motor embodying my invention; and, Fig. 2 is a cross section on the line 22 of Fig. 1. I

, Mounted on the shaft 10 of a dynamoelctric machine is a core 11 which is preferably laminated and provided with slots for the reception of windings 12. The lamina of the core 11 are held together by end disks. one of which is shown at 13 abutting a flange 14 on the shaft 10. The end disk 13 is provided with a projection 15 for the purpose of supporting the end turns of the windings 12. A sleeve 16 is also mounted on the shaft 10 and is provided with fan blades 17, which are preferably integral. The fan blades are located between current-collecting members or slip rings 18 and the rotor core 11, extending axially andradially of the machine underthe end-turns of the rotor Winding. The'slip rings 18 are mounted on and insulated .from the sleeve 16, and are spaced by insulating members 19. A nut 20 engages a threaded portion 21 of the shaft 10 to force the sleeve 16 firmly against an enlarged portion 22 of the shaft. The yoke a laminated stator core 26; This core is nrovided with the usual slots and windings 27. An end cover 28 incloses the cores and the windings and is provided with ventilating openings 29.

By means of the fans air which is drawn in through the ventilating openings 29 is forced outward between the projecting endturns of the rotor and stator windings, thus keeping them cool. The end cover'is so arranged and shaped as to direct the-currents of air through openings 30 in end disks 31 out through the stator core structure and through the ventilating openings 25. By means of this arrangement the cooling air is kept in motion while the'machine is in operation, none of it being pocketed,

thus providing for a continual circulation of cooling fluid. 1

It is evidentthat there may be many modifications of the precise arrangement herein shown and described, and I aim in my claims to cover the invention broadly.

What I claim as new is:

1; In a dynamo-electric machine, the combination of a shaft, :1 core mounted on said shaft, a current collecting member, means mounted on said shaft for supporting said current collecting member, and fan blades mounted on said supporting means adjacent parts, the working surfaces of said fan means being so disposed as to draw cooling fluid across the surface of said current 001- lecting device and to force said fluid toward said core and about the end portions of said =winding when said machine is in operation.

3. In a dynamo-electric machine, a shaft, a core mounted thereon and provided with a winding having projecting end portions, a current collecting device. mounted on said shaft, and fan means mounted to rotate with said shaft and positioned intermediate said current collecting device and said core, the.

working surfaces of said fan means being of such form and. so disposed as to draw air In trashimony whemof I my signature over the exterior surfaceof 'said collecting in @he pi'esene if two witnesaes. device and forcethe same oubward througih EMIL MATTMAN. the emi gortions of said winding when t e v v Witnesses: 1 5 machine IS in operation; r 'CHAs. L. BYRON,

Milwaukee, Wis., Sppt. 9,1?09; BOB. E. STALL. 

